问题如下图：
选项：
A. 
B. 
C. 
难道不应该是Equilibirum Term Structure Model 需要更多parameters吗？何老师上课讲到Equilibrium需要更多参数的。
NO.PZ201701230200000303 No, she is incorreabout whitype of mol requires fewer parameter estimates No, she is incorreabout whitype of mol is more precise moling market yielcurves A is correct. Consistent with Mason’s statement, equilibrium term structure mols require fewer parameters to estimaterelative to arbitrage-free mols, anarbitrage-free mols allow for time-varying parameters. Consequently, arbitrage-free mols cmol the market yielcurve more precisely thequilibrium mols.Equilibrium mol中不是有么，这不也表示跟时间相关么，不也应该是vary with time么
老师，arbitrage - free mol 和现实market pri更符合，所以就更precise吗？
